portmap: fix error release already mapped ports
portmap: fix error release already mapped ports

Should not release all port maps since this will
cause the port maps setup by other pod being cleaned.

Signed-off-by: Gao feng <847df59f7b32f8c32be21b40e9fcead2da431b78@hyper.sh>

ruo91/hyper,ZJU-SEL/hyper,hyperhq/hyper,ksmaheshkumar/hyper,ruo91/hyper,Crazykev/hyper,feiskyer/hyper,heiden-deng/hyper,gao-feng/hyper,Crazykev/hyper,hyperhq/hyperd,laijs/hyper,ksmaheshkumar/hyper,hyperhq/hyper,heiden-deng/hyper,bergwolf/hyperd,ruo91/hyper,bergwolf/hyperd,bergwolf/hyperd,jefby/hyper,feiskyer/hyper,heiden-deng/hyper,no2key/hyper,ZJU-SEL/hyper,feiskyer/hyper,WIZARD-CXY/hyper,no2key/hyper,bergwolf/hyperd,hyperhq/hyper,WIZARD-CXY/hyper,WIZARD-CXY/hyper,heiden-deng/hyper,no2key/hyper,laijs/hyper,hyperhq/hyperd,laijs/hyperd,jefby/hyper,laijs/hyperd,feiskyer/hyper,no2key/hyper,laijs/hyper,Crazykev/hyper,gao-feng/hyper-public,jefby/hyper,gnawux/hyper,gao-feng/hyper-public,ksmaheshkumar/hyper,gnawux/hyper,gao-feng/hyper,WIZARD-CXY/hyper,gnawux/hyper,hyperhq/hyper,ruo91/hyper,gao-feng/hyper,gao-feng/hyper,laijs/hyperd,hyperhq/hyperd,laijs/hyper,ksmaheshkumar/hyper,ZJU-SEL/hyper,gao-feng/hyper-public,ZJU-SEL/hyper,jefby/hyper